| Millennium: | 1st millennium BC |
|---|---|
| Centuries: | 2nd century BC – 1st century BC – 1st century |
| Decades: | 60s BC 50s BC 40s BC – 30s BC – 20s BC 10s BC 0s BC |
| Years: | 41 BC 40 BC 39 BC – 38 BC – 37 BC 36 BC 35 BC |
| 38 BC by topic | |
| Politics | |
| State leaders – Sovereign states | |
| Birth and death categories | |
| Births – Deaths | |
| Establishments and disestablishments categories | |
| Establishments – Disestablishments | |
| Gregorian calendar | 38 BC |
| Ab urbe condita | 716 |
| Armenian calendar | N/A |
| Assyrian calendar | 4713 |
| Bahá'í calendar | -1881–-1880 |
| Bengali calendar | -630 |
| Berber calendar | 913 |
| English Regnal year | N/A |
| Buddhist calendar | 507 |
| Burmese calendar | -675 |
| Byzantine calendar | 5471–5472 |
| Chinese calendar | 壬午年 (2599/2659) — to —
癸未年(2600/2660) |
| Coptic calendar | -321–-320 |
| Ethiopian calendar | -45–-44 |
| Hebrew calendar | 3723–3724 |
| Hindu calendars | |
| - Vikram Samvat | 19–20 |
| - Shaka Samvat | N/A |
| - Kali Yuga | 3064–3065 |
| Holocene calendar | 9963 |
| Iranian calendar | 659 BP – 658 BP |
| Islamic calendar | 679 BH – 678 BH |
| Japanese calendar | |
| Korean calendar | 2296 |
| Minguo calendar | 1949 before ROC 民前1949年 |
| Thai solar calendar | 506 |
Year 38 BC was either a common year starting on Sunday or Monday or a leap year starting on Saturday, Sunday or Monday (link will display the full calendar) of the Julian calendar (the sources differ, see leap year error for further information) and a common year starting on Sunday of the Proleptic Julian calendar. At the time, it was known as the Year of the Consulship of Pulcher and Flaccus (or, less frequently, year 716 Ab urbe condita). The denomination 38 BC for this year has been used since the early medieval period, when the Anno Domini calendar era became the prevalent method in Europe for naming years. It was also the first year (year 1) of the Spanish era calendar in use in Hispania until the 15th century.